Device for driving anchoring members

ABSTRACT

A device for driving anchoring members is formed of a casing enclosing a barrel and a gripping sleeve and cap member slidingly mounted on the exterior of the casing. The gripping sleeve and cap member can be operatively engaged with the barrel to move as a unit relative to the casing. A lever is pivotally mounted on the casing and is movably positionable into alignment in front of the bore in the barrel and a slot in the barrel wall for moving an anchoring member and a hammer piston into the firing position within the barrel.

United States Patent Inventor Filed Patented Assignee Priority Appl No.

Wolfgang Bayer Schaan, 0

July 10, 1968 Jan. 19, 1971 Hilti Aktiengesellschaft Schaan, Liechtenstein July 14, 1967 Germany DEVICE FOR DRIVING ANCHORING MEMBERS 7 6 Claims, 3 Drawing Figs.

[52] US. Cl i 227/11 [51] Int. Cl BZSC 1/18 [50] Field of Search. 227/8, 10

[56] References Cited UNITED STATES PATENTS 3,172,119 3/1965 Siddons 227/l0X 3,468,465 9/1969 Mulno 227/10 Primary Examiner-Granville Y. Custer, J r. Attorney-McGiew and Toren ABSTRACT: A device for driving anchoring members is formed of a casing enclosing a barrel and a gripping sleeve and cap member slidingly mounted on the exterior of the casing. The gripping sleeve and cap member can be operatively engaged with the barrel to move as a unit relative to the casing. A lever is pivotally mounted on the casing and is movably positionable into alignment in front of the bore in the barrel and a slot in the barrel wall for moving an anchoring member and a hammer piston into the firing position within the barrel.

. DEVICE on m'tlvluo material.

- the invention.

ancno 'nvo MEMBERS SUMMARYOFTHEINYENTION' This invention is directed to an" anchoring member driving mechanism and. more,particularly, it concerned with a member attached to the mechanism "for moving anchoring members and the hammer piston of-the mechanism from the nozzle end to theopposite end of the borein the mechanism Devices usedfor driving anchoring members, such as bolts and the like, into hard receiving material by means of an explosive charge contained'in a cartridge generally employ a hammer pisto h which'is: freely displaceable axially through the barrel ofthe device.' in the firing position; the :rear end of the piston is disposed against a cartridge bearing end of the barrel and its forward end supports an anchoring rnernbe r. The present invention; is primarily concerned'with the manner in which the anchoring m'emberand the'piston' are placed in the firing position within the barrel. v r

ln devices for driving anchoring members it has been known to use a separate rod, not attached to the device for moving the anchoring member and the hammer piston through the barrel into the firing position.

Where a separate loadi g rod is employed ithas thedisadvantage thaFafter thej loading operation is completed; it must beset aside and it is qu te possiblethat it may become lost or displaced. Further, when opera'ting thef-device ,in locations spaced above the ground. such on scaffolds, the loading'rod r 2 r v BRIEF DESCRIPTION OF THE DRAWINGS V In the drawings: I a k I r FIG. 'I is a view.'partly in sectiodtakenzilong the axis of the forwardend of an anchoring member driving device embodyingthe present invention;'

FIG. 2 is an end view'of the device'shown in FIG. 1 taken in the direction of the arrow "in FIG. I; and

'FIG. '3 is a detail viewof a grooveformed in the nozzle end of the barrel of the'device shownfin FIG. I.

. oer/LED DESCRIPTIONOIFYTHE PREFERRED.

. "-VVIEMBODIMENT l In the drawing the forward'end'of' a' device fordriving anchoring members into a receiviiig material is'shown comprised of anaxially extending casing]. the left end of which in FIG. 1 designates the discharge or nozzle end of the device.

Disposed about the outer surface of the casing l is a gripping sleeve 2 to which a transversely arranged protectivecap 3 is secured by means 'of screws 8.The sleeve'2and cap Sare connected together for rotational andaxial'ntovement relative to thercasi'ng. At the nozzle end of the casing'on'a part thereof v leveris attached to the casing and its shorter leg extends 'sub mayfall and be lost or bedifficult to recover. Moreover; the

"requirmerit fot handling the rod'du'ring the =lpading operaftions and then placing it in some other positioninvolves a cer tain amount of lost effort and tends to.reduee the'efficiency of anchoring memberinserting'operations. I l Acc rdingly, it is the primary object'ofthepresentinventionto overcome the disadvantages experienced where a separate loading rod is employed and-to afford a device incorporating means for loading the anchoring member and hammer pistoninto the firing'position. f

Anoth'er'objectof the inventionis to providea which will position the anchoring memberandithe hammer piston in the firing positioninthe barreljand then be 'remova'-' ble from the barrel so as not t intei'fere or impede the operation of inserting,theanchoring.mech anism into a receiving Moreover. another objectofthe invention is tofprovide a device which issimplein arrangement. effective in operation andeasytohandle l l g j A x r,

Therefore. i th P t i lYenl pl a ev is P P l Y mounted onthe casin'g of the device. and is movablebetween a. first position for loading the anchoring members and hammer piston into the firing position and a second position where the lever is moved out of alignment with the-barrel of the device. Further; a gripping sleeve and cap member are connected together and are arranged on the casing to engage the barrel for movement as a unit relative to'the casing. An arm or lever is pivotally fixed to the casing and when the barrel is displaced axially in the firingdirection the lever enters the barrel and guides the anchoring mechanism and the hammer piston into the firing position. Y

Q firing position. In its first position the lever is aligned with the slot and'with the borethrough the barrel ofthe device. When it is moved into its second position," the lever is displaced out of alignment with the bore and the slot so that it does not interfere with the firing of the anchoring members. I The various features of noveltywhich. characterize the invention are pointed out with particularity in the' claims annexed to and forming a part of this specification. For a better which projects through an opening in the cap 3,'anL -shaped I I lever or arm 4 is pivotally attached to it and the lever is movable between a first position. as shown in ElG. Land at second position. asshown in FIG. 2. Th'ejlo'nge'r leg of the L-shaped stantially pcrpendicularly'tothe longer leg at itsend remote from its print of attachment to thecasing'kTh'e pivotaxis of'the v armA extends throughthe wall ofthecasing perpendicularly I to the axis of the casing. Secured to the face' of the cap 3 by means of a screw I1 is 'a'cam:memb,er 5. g

Disposed within the casing is a barrel 6 having a bore'fia which extends betweena nozzle end=6b anda cartridge bearing end'6c. The-barrel 6 is 'slidablyfpositionable in the axial direction through the casing l. The inner surface ofthe casing l, and the outer surface of the barrel 6 are shaped to provide an annular open space lb closed fat' theopposite ends thereof by annularly extending shoulde r la-on the casing and an v annularly extending shouldered on thebarreLThe length ofthe space lbdetermin'esthe extent o'fimovement of the barrel ing a'stop for'the shoulder6d onthe barrel. 7

A'hammer'piston 7 is located in the barrel. and as shown in FIG. lit is located in the firing position atthe cartridge end of in the axial direction with the shoulder la on the casing formthe barrel. For firing anchoring m'embersfrom the bore of the barreLthe hammer piston is'freely'movable" through the barrel. A tits forward end B, facing in the dir'ectionof the nozzle end 6b of thebarrel, thejhammer piston isarran'ged to receive an anchoring member. such as'the bolt 12 shown in FIG. I, the head of which seats within the end [30f the hammer piston. In addition to the support provided by the hammer piston 7, the bolt is also supported by a washer 14 disposed concentrically about the shank of the bolt 12 and extending radially outwardly into contact with the surface of the bore.

As viewed in'FlG. l; the upper'portion of the barrel6 contains a Jshaped groove while the lower part of the barrel contains an axially extending slot 16 which is open at the nozzle end of the barrel and extends rearwardly through the wall of the barrel toward its cartridge end. The .I-shaped groove 15 is formed of two parallel and spaced-groove components 150,

I 15b joined by a transverse groove component 15c spaced inwardly from the nozzle end of the barrel. The groove component 15a is open at the nozzle end of the-barrel while the groove component 15b is closed and terminates inwardly from the nozzle end of the barrel. 1

In operating the device. the hammer piston 7 is'located at I the nozzle end of the barrel and a bolt'lZ is inserted into the understanding of the invention, its operating-advantages and bore with its head fitted within the end 13 of the piston 7. Initi'ally, the bolt is inserted a sufficient distance into the barrel so that the washer l4 rests against the surface of the bore 6a,

Next, the gripping sleeve 2 and the cap} are rotated in the direction of the arrow III shown in FIG. 2 so that the cam 5 is moved out ofthe groove component through the groove component 150 into the groove component 1511. In this position. the gripping sleeve can be moved forwardly and the cam 5 engages the barrel 6 within the groove component [5b for moving the barrel forwardly in the firing direction relative to the casing lv When the bolt is inserted into the barrel. the lever 4 is in its second position as indicated in FIG. 2, that is extending transversely to the axis of the bore and disposed out of alignment with the bore and the barrel. In the second position the lever or arm 4 extends laterally outwardly from the casing across the forward face of the cap 3. that is, the face oriented toward the nozzle end 612 of the barrel. As the gripping sleeve and cap member are moved forwardly. along the casing, the forward face of the cap 3 pivots the lever 4 about its axis in the casing from the second position, see FIG. 2. into the first position, see FIG. 1. where the upstanding leg of the L-shaped lever is aligned with the bore 6a and the slot 16 through the barrel. As the interengaged gripping sleeve, cap member and the barrel continue to be moved forwardly, the upstanding shorter leg of the lever 4 enters the slot and the bore in the barrel and engages the face of the washer l4 and moves the bolt 12 and the hammer piston 7 to the opposite end of the barrel since the lever 4 is secured to the casing which is in a stationary position relative to the movement of the gripping sleeve and barrel.

After the bolt 12 and the hammer piston 7 are disposed in the firing position, the sleeve 2 and cap 3 along with the barrel 6 are returned in the direction of the cartridge end of the barrel on the casing, again assuming the position shown in HO. 1. After the rearward motion is completed, by effecting a rota tional movement between the sleeve and the casing in the opposite direction to the arrow ill of FIG. 2, the cam 5 is moved from the groove component 15b through the groove component 150 back into the groove component 15a and the device is loaded and ready to drive the bolt into a receiving material.

Further, with the cap and sleeve returned to the position shown in FIG. 1, the lever 4 is returned to the position in HQ 2 where it is held in position across the forward face of the cap so that it does not interfere with the firing of the device.

Iclaim:

1. An anchoring member nozzle mechanism comprising a casing, a barrel disposed within said casing and forming an axially extending bore therethrough having a nozzle end and an oppositely disposed cartridge end and said bore arranged to receive an anchoring member inserted into its nozzle end, said barrel having a slot extending in the axial direction from the nozzle end thereof toward the cartridge end and transverse to the axial direction said slot extends from the outer surface of said barrel to the bore therethrough, said barrel being movable relative to said casing in the axial direction of its bore, an arm pivotally fixed to said casing at the end thereof located adjacent to the nozzle end of said barrel, said arm arranged to be pivoted between a first position aligned with said bore and slot in said barrel and a second position pivotally displaced out of alignment with said bore and said barrel, first means cooperating with said casing for moving said arm between its first and second positions, and second means cooperating with said first means for moving said barrel axially relative to said casing and arm so that its nozzle end is projected outwardly from said casing whereby with said arm in the first position as said barrel is moved axially in the direction of its nozzle end said arm extends through said slot into said bore in said barrel and is arranged to displace. an anchoring member located therein from the nozzle end toward the cartridge end of the bore.

2. An anchoring member driving mechanism, as set forth in claim 1, wherein said first means comprises a gripping sleeve disposed about and movably mounted on said casing radially outwardly from said barrel. a cap member extending transversely of and secured to said sleeve at itsend adjacent the nozzle end of said barrel, the nozzle end of said barrel extending outwardly from the adjacent end of said casing, said cap having a central opening therein dis osed about the outer surface of said barrel, and said secon means comprises a cam attached to said cap member and selectively engageable with said barrel for displacing said barrel relative to said casing.

3. An anchoring member driving mechanism, as set forth in claim 2. wherein a J-shaped groove is formed in the exterior surface of said barrel and is composed of a pair of groove components spaced apart and extending in the axial direction of said barrel with another groove component interconnecting said axially extending groove components at a location spaced from the nozzle end of said barrel, one of said pair of groove components being longer than the other and being open ended at the nozzle end of said barrel and extending therefrom toward the other end of said barrel to said interconnecting grove component. and the other of said pair of groove components extending from said interconnecting groove component toward the nozzle end of said barrel and terminating at a location spaced from the nozzle end of said barrel so that it forms a stop surface against which said cam acts for axially displacing said barrel relative to said casing.

4. An anchoring member driving mechanism, as set forth in claim 1, wherein the inner surface of said casing and the outer surface of said barrel are shaped to provide an axially extending annular open space therebetween closed at one of its ends by a radially outwardly extending shoulder on said barrel and at its other end by a radially inwardly extending shoulder on said casing whereby the axial movement of said barrel outwardly from said casing is limited to the length of said annular space in the axial direction of said barrel.

5. An anchoring member driving mechanism, as set forth in claim I, wherein a hammer piston is disposed within and is axially movable through the bore in said barrel and is arranged to drive anchoring members outwardly from said barrel, said hammer piston is shaped at its end closer to the nozzle end of said barrel to provide a recess for receiving the end of an anchoring member and its end closer to the nozzle end is spaced inwardly from the surface of the bore within said barrel.

6. An anchoring member driving mechanism, as set forth in claim 1, wherein said arm has an L-shaped configuration having one leg thereof pivotally secured to the end of said casing and the other leg extending outwardly from said one leg at its end opposite the end pivotally secured to said casing and said other leg arranged to extend through the slot in said barrel into the bore therein when said barrel is displaced axially in a direction of its nozzle end for displacing an anchoring member within the bore toward the cartridge end thereof. 

1. An anchoring member nozzle mechanism comprising a casing, a barrel disposed within said casing and forming an axially extending bore therethrough having a nozzle end and an oppositely disposed cartridge end and said bore arranged to receive an anchoring member inserted into its noZzle end, said barrel having a slot extending in the axial direction from the nozzle end thereof toward the cartridge end and transverse to the axial direction said slot extends from the outer surface of said barrel to the bore therethrough, said barrel being movable relative to said casing in the axial direction of its bore, an arm pivotally fixed to said casing at the end thereof located adjacent to the nozzle end of said barrel, said arm arranged to be pivoted between a first position aligned with said bore and slot in said barrel and a second position pivotally displaced out of alignment with said bore and said barrel, first means cooperating with said casing for moving said arm between its first and second positions, and second means cooperating with said first means for moving said barrel axially relative to said casing and arm so that its nozzle end is projected outwardly from said casing whereby with said arm in the first position as said barrel is moved axially in the direction of its nozzle end said arm extends through said slot into said bore in said barrel and is arranged to displace an anchoring member located therein from the nozzle end toward the cartridge end of the bore.
 2. An anchoring member driving mechanism, as set forth in claim 1, wherein said first means comprises a gripping sleeve disposed about and movably mounted on said casing radially outwardly from said barrel, a cap member extending transversely of and secured to said sleeve at its end adjacent the nozzle end of said barrel, the nozzle end of said barrel extending outwardly from the adjacent end of said casing, said cap having a central opening therein disposed about the outer surface of said barrel, and said second means comprises a cam attached to said cap member and selectively engageable with said barrel for displacing said barrel relative to said casing.
 3. An anchoring member driving mechanism, as set forth in claim 2, wherein a J-shaped groove is formed in the exterior surface of said barrel and is composed of a pair of groove components spaced apart and extending in the axial direction of said barrel with another groove component interconnecting said axially extending groove components at a location spaced from the nozzle end of said barrel, one of said pair of groove components being longer than the other and being open ended at the nozzle end of said barrel and extending therefrom toward the other end of said barrel to said interconnecting grove component, and the other of said pair of groove components extending from said interconnecting groove component toward the nozzle end of said barrel and terminating at a location spaced from the nozzle end of said barrel so that it forms a stop surface against which said cam acts for axially displacing said barrel relative to said casing.
 4. An anchoring member driving mechanism, as set forth in claim 1, wherein the inner surface of said casing and the outer surface of said barrel are shaped to provide an axially extending annular open space therebetween closed at one of its ends by a radially outwardly extending shoulder on said barrel and at its other end by a radially inwardly extending shoulder on said casing whereby the axial movement of said barrel outwardly from said casing is limited to the length of said annular space in the axial direction of said barrel.
 5. An anchoring member driving mechanism, as set forth in claim 1, wherein a hammer piston is disposed within and is axially movable through the bore in said barrel and is arranged to drive anchoring members outwardly from said barrel, said hammer piston is shaped at its end closer to the nozzle end of said barrel to provide a recess for receiving the end of an anchoring member and its end closer to the nozzle end is spaced inwardly from the surface of the bore within said barrel.
 6. An anchoring member driving mechanism, as set forth in claim 1, wherein said arm has an L-shaped configuration having one leg thereof pivotally secured to the end of said casinG and the other leg extending outwardly from said one leg at its end opposite the end pivotally secured to said casing and said other leg arranged to extend through the slot in said barrel into the bore therein when said barrel is displaced axially in a direction of its nozzle end for displacing an anchoring member within the bore toward the cartridge end thereof. 